/*
 * @author 707<707472783@qq.com>
 * This program creates the Sales_data struct opnion my view.
 */
#include <iostream>
struct Sales_data {
    std::string isbn;
    double price = 0;
    std::string name;
    int amount = 0;
    std::string order_no;
};

int main()
{
    return 0;
}
